Should You Use Internal or External Air Circulation in the Car on Snowy Days?

[StLincoln]

Use external air circulation on snowy days. Reasons for using external circulation: In winter, due to lower temperatures, car windows are usually kept closed while driving. Prolonged lack of air circulation reduces oxygen levels inside the car, making it increasingly stuffy and uncomfortable for passengers. Function of external circulation: It's necessary to activate the car's external circulation to facilitate timely air exchange with the outside environment and refresh the interior air. When external circulation draws in cold air from outside, it passes through heating elements, converting even cold incoming air into warm air inside the cabin. Additionally, prolonged winter enclosure can easily cause window fogging, which can be quickly cleared using external circulation.